Jiya is an alien and a galaxy patrol member on a mission to Earth. His first encounter with humankind is rescuing a rich party girl, Kaede, and her chauffeur Kyuumonji Yukio from mountain bandits. Using Kyuumonji's body as a host, Jiya is going to check out rumors of a recent infestation of "vampires" on Earth that are attacking beautiful young women.

From: Easy Going Scans:

Long ago, when danger approached the Earth, there existed people exhibiting their superhuman powers to save the planet; to help the weak; to defeat evil and to promote justice. Earth never hesitated to sacrifice such beings.

The powerless set these people apart and honored them by calling them heroes. However...the era somehow changed...

A cyberpunk-ish spin on the legendary hero, Momotarou.

From Prisms:

A romantic comedy about Fuwa, a guy living in a small apartment in overcrowded Tokyo, who wants to have a place of his own. Because of a building accident in their new office building, Fuwa's company (5 employees) had to move into his apartment, right after he had moved to a larger place. And the new employee (Hiyama Izumi, a 15 year-old girl) had to move into Fuwa's place, as she had just come from the country. Then Fuwa's old girlfriend Tokiko, who had already gotten married, ran away from her husband and came to Fuwa's place.

This is Daikichi Kamiyama. A College Student at Toudai University. He had came back to his home town to attend such a prestigious University. He happened upon a cafe where once stood a great wrestling arena lead by the "Amazoness kitty." Now three daughters remain running it. Yukihyou (Who has taken a sudden interest in him.) Ferris (A rather ditzy young woman.) And Leona (A Tsundere-ish big boobed girl with a rather "Unique" Ability in the wrestling ring.) Join Daikichi "sandbag" Kamiyama as he endures the trials ahead of him with these Bombshells.

Daisuke is a 23 year-old new schoolteacher. He ends up being put in charge of a 3rd grade elementary school class since the previous teacher quit, and in that class there's a girl who's quite a troublemaker--Rin Kokonoe. You could call her a masegaki (used to describe a kid that acts more like an adult in some ways), and she's also part tsundere (though more dere than tsun).

In the Noramimi universe, most families own a 'mascot'. These strange and amusing creatures live at home and act as companions for younger children.

Noramimi is one such mascot. Unfortunately for him, he is an ogre type and thus not popular with children, who prefer 'cuter' alternatives. Unwillingly, he decides to 'home stay' at "Hello Kids" - an agency that organizes matters between mascots and humans.

But, like all mascots, his heartfelt wish is to one day be adopted by a family...

On the last day of school, Mihane confesses to her senpai the long-term admiration she's had for her ever since they met, as well as tells her that she will try her best to enter Niji no Oka Girls' Academy next year, the school to which her Senpai is going to attend. Now, one year later, she's managed to pass the entrance exam to the prestigious school and is taking the bus to the school. Unfortunately, she takes the wrong bus, but encounters an interesting first-year girl, like her, that is also set to attend Niji no Oka Academy.

Twenty-nine-year old Kurose Kazumi is a programmer in an eroge company and has played plenty of galges when he was younger, but he's completely uninterested in young girls. A chance encounter changes that when a confused middle schooler approaches him due to a misunderstanding, but he realizes how sweet she is and wants to keep meeting her.

From Beast's Lair: Based on the Doujin Fighting game, Melty Blood, made by the Doujin group, Watanabe Seisakujyo (now known as French Bread). This story is one of two side-story sequels occurring approximately a year after the 'good-ending' story of Arcueid from the original Type-Moon game, Tsukihime. One year has passed since the 'Serial Vampire Homicide case' was solved by the deaths of Nero (Nrvnqsr) Chaos and Roa/Shiki Tohno. But now the rumors of serial murders are happening again. And so, once again, Shiki Tohno patrols the city to find this phantom killer. On patrol he meets--and fights--a mysterious woman named Sion Eltnam Atlasia; member of the church group 'Alchemist of Atlas', who seek to cure vampirism. But to do so she needs data from Arcueid, the last True Ancestor, to help her in her research. But this won't be easy: Ciel is also patrolling the city looking for the rumored killer, while Akiha has been acting strangely the past few days. Also, Arcueid hasn't been seen for awhile--could she be the killer...?

Rikitaro is a musician whose dream is to become a rock star just like Jimi Hendrix or Jim Morrison, but at the age of 27 that dream is fading away rapidly.
Ooishi is a 3 time world boxing champion who recently retired and is now in the entertainment world, shooting a boxing reality show.
These two unlikeliest of people cross paths one day, but both of them think nothing of it until weeks later. Rikitaro is given one last shot by a record label to sign a deal but before that, they need him to get into better shape so that he is easier to sell. He stumbles upon a boxing gym which also happens to be the same gym Ooishi is filming his show.
As fate’s wheels start to turn, neither man realizes that they will work together to train the best boxer ever, even better than Ooishi himself.

Takaki loves ranking the popular and beautiful girls at his school. The one standing at the top is the foreign transfer student Emilia Shutrause, and being a student from Europe, she is extremely popular among the male students at Takaki’s high school. Although he was just a spectator of this school idol, that would change when one day he accidentally bumps into Emily (Emilia’s nickname) and he finds out her secret...

Haunted by a space flight accident that claimed the life of his beloved wife, Yuri finds himself six years later as part of a team of debris cleaners on a vessel called the Toy Box charged with clearing space junk from space flight paths. The team consists of Hachimaki, a hot shot debris-man with a sailor's affinity for the orbital ocean; Fee, a chain-smoking tomboy beauty with an abrasive edge; and Pops, a veteran orbital mechanic whose avuncular presence soothes the stress of the job.

Note: Won the Seiun Award in 2002.

Weak, bullied, and pessimistic about life, that's Setsuna Kashiwagi. On the verge of jumping off a bridge, a mysterious man appears behind him and offers the contract "10 million yen in exchange for your life in a year." Skeptical at first, he accepts. Waking up the next morning, thinking it was just a dream, he notices 2 beautiful women sitting beside him. They are Kanna and Rena, Oni princesses here to claim his heart in a year.

STYLISH ACTION FROM THE AUTHOR OF ARCHLORD! The new English teacher, Chun-Woo, is not your ordinary teacher. Shioon, a victim of constant bullying, unexpectedly witnesses Chun-Woo's fighting power, and begs him to make him his disciple. Chun-Woo claims he can teach Shioon only if he is truly determined, and Shioon must jump off a bridge into a deep river in order to prove it! It turns out, however, that Chun-Woo and his powers are more than meets the eye. Shioon makes a grand entrance into the hidden world of martial arts, and he is about to be taught by the best there is! You can read part 2: The Breaker - New Waves here.

Manhwa you may like:
+ The Gamer - ​THE 게이머
+ Gosu 고수
+ Yongbi The Invincible 용비불패

A spin-off story focuses Kazuma Ikezawa (King Kazuma), Natsuki Shinohara's cousin, as he battles his way in the Oz Martial Art Competition.

Sadashima fell in love with a handsome senpai while she was in high school, but didn't have the guts to tell him before he graduated and moved away. When Sadashima graduates the next year, she follows her senpai, Shirahai, to Tokyo and manages to move in next door. She totally believes that the two of them can now hook up, and can't wait to knock on his door to 'coincidentally" find themselves neighbors.

She's flabbergasted to find a woman answering Shirahai's door, and then blown away to find out the woman is Shirahai! He's had a sex change!

NEETs are people who have chosen not to be part of society due to personal problems or just straight-out laziness.

This story is centered around a certain young woman who has become a NEET right after high school without even realizing it. In her case, though, it's not that she doesn't want work - but rather that there is not a single job out there which can fulfill her very specific criteria...

Oh, well...at least her mother understands her!

From FairGame:

"Live with Sincerity" is Natsuki Taiyou's motto. It's the first day of high school, Taiyou was heading to school and then he meets Hinata during the way there. He fell in love at first sight and suddenly confessed to her. Her answer was yes but then she ran away without saying who she was, but it turns out that she was his classmate. Taiyou felt a destiny between them. However, on the next day, she doesn't remember who he is. Why could that be...?

Watanuki Kimihiro is a high school student plagued by yokai and ayakashi – spirits with a strong attraction to him. The spirits are invisible to others and encounters with them are extremely troublesome. When he stumbles into a shop that grants wishes, however, events in his life promise to become more unusual. The shop is owned by Yuuko Ichihara – a mysterious and beautiful (sometimes playful) witch of many names and esoteric renown. For a price, she offers to grant Watanuki's wish to be rid of the spirits. The price, according to Yuuko, must be of equal value and so, as payment, he temporarily becomes Yuuko's part-time employee – a maid to be precise! Watanuki's job also seems to consist of small errands dealing with the supernatural including the household chores. His love interest Himawari Kunogi, and "rival" Doumeki Shizuka, occasionally join him in his work as per Yuuko's request. The three become increasingly close despite Watanuki's annoyance with Doumeki. Yuuko constantly refers to "hitsuzen", meaning inevitability, destiny, or fate, as being the driving force in the world. She states that there is no such thing as coincidence, and that every single action and decision is inevitable, because without them, other related events in the future could not happen.